There's a persistent bug still in Patch 3: if you try to move around enemies before attacking them (while staying in their zone of control), you can lose all your movement and actions without any apparent reason.
Edit: Actually, none of my characters can take actions any longer. I'm still in the ship tutorial part. Seems like I'll have to wait for a hotfix and start again. All I can do is keep skipping my turns, because nobody has any movement or actions.